JPS6040847B2 - Cooking device - Google Patents

Description

[Detailed Description of the Invention] Conventionally, cooking appliances such as electric mixers drive an electric motor by opening and closing a power switch attached to the main body, and the rotating force is transmitted to a cutting cutter to perform cutting and thickening. However, if the cutter becomes locked or overloaded by the object to be cut, there is a risk that the main body may be deformed or the motor may be burnt out.

The present invention solves the above-mentioned drawbacks by providing a wind pressure switch whose contacts are closed by the wind pressure of a fan installed on the drive shaft of the motor when the motor exceeds a set rotation speed, and is activated in parallel with the wind pressure switch. A starting switch is provided to turn the power on to the motor only when the cutter is locked or overloaded, which may cause deformation of the main body or burnout of the motor. The wind pressure generated by the fan installed on the drive shaft of the machine is also reduced, and by opening the wind pressure switch and opening the motor circuit, accidents such as deformation of the main body and burnout of the motor can be prevented.

An embodiment of the present invention will be described below with reference to the drawings.

In the figure, 1 is the main body of the mixer with a built-in electric motor 2, and 3
is the drive shaft of the electric motor 2, and a lower connector 4 is attached to the top end. 5 is a mixer cup, the main body 1 of the mixer
It is removably equipped on the top.

Reference numeral 6 denotes a connector to which the rotation of the electric motor 2 is transmitted via the lower connector 4, and is connected to a cutting cutter 8 by a main shaft 7.

Reference numeral 9 denotes a cup bottom forming a main bearing that pivotally supports the main shaft 7 of the cutting cutter 8 in the center, and a mixer cup 5 and a cup stand 10.
are fixed between them by screwing together.

11 is a fan provided on the drive shaft 3 of the electric motor.

Reference numeral 12 denotes a movable contact body that is operated by the wind pressure generated by the rotation of the fan 11. As shown in FIG. That is.

A fixed contact body 13 constitutes the wind pressure switch A together with the movable contact body 12.

Reference numeral 14 denotes a starting switch, which closes the circuit only while being pressed, and is connected in parallel with the wind pressure switch A.

15 is a fence provided around the fan 11, and as shown in FIG. 2, a part of the fence facing the movable contact body 12 of the wind pressure switch A is cut out.

Reference numeral 16 indicates a bottom plate covering the lower entrance of the main body 1, and IT indicates a stop switch, which normally closes its contacts, but opens the contacts and opens the circuit only when pressed.

In the above configuration, when the starting switch 14 is pressed, the electric motor 2 starts rotating.

When the rotation of the electric motor 2 exceeds the set rotation speed, the movable contact body 12 of the switch A moves due to the wind pressure of the fan 11 attached to the lower part of the drive shaft 3 of the electric motor 2, contacts the fixed contact body 13, and reduces the wind pressure. The circuit of switch A is closed. The operation of the wind pressure switch is sensitively performed due to the configuration of the movable contact body 12 and the action of the force 15. At this point, even if you stop pressing the starting switch 14 and the circuit of the starting switch 14 opens, the contacts 2 and 13 of the wind pressure switch A are closed, so the motor circuit is closed and the motor 2 continues to rotate. . Here, when the cutter 8 for cutting is locked or overloaded, and the rotation speed of the electric motor 2 becomes lower than the set rotation speed, the wind pressure generated by the fan 11 installed in the drive koji 3 of the electric motor 2 decreases. However, the movable contact body 12 of the wind pressure switch A returns to its original position and the contacts 12 and 13 are opened to open the circuit, so that burnout of the electric motor 2 and thermal deformation of the main body will not occur.

In addition, in order to stop the electric motor 2 which continues to rotate normally at a rotation speed higher than the set number of rotations, in addition to the wind pressure switch A, a contact provided in series with the switch is normally closed, but when pressed. Press the stop switch 17, which opens the contacts and opens the circuit.

Next, another embodiment shown in FIG. 5 will be described.

In this embodiment, the functions of a starting switch and a wind pressure switch are performed by a pair of contact bodies 12 and 13, and the same parts as in the previous embodiment are given the same reference numerals. 14a is a starting switch; 18 is a switch shaft held by a switch case 201, and a contact body 13 is located at the tip.

19 is when the starting switch arm 14a is not pressurized,
This is a spring set so that the contact bodies 12 and 13 do not close.

In this embodiment, the functions of the starting switch 14 and the wind pressure switch A are performed by a pair of contact bodies, so the structure is extremely simple and the overall size can be reduced. In this way, the present invention provides a cutting cutter.

If the motor is stuck or overloaded, and there is a risk of burnout of the motor or deformation of the main body, the lower rotational speed of the motor is used to open the wind pressure switch to open the motor circuit. Therefore, it is possible to provide a highly safe cooking appliance that prevents dangers such as burnout of the electric motor and deformation of the main body.

[Brief explanation of the drawing]

The figures show one embodiment of the present invention, in which Fig. 1 is a side view showing the main parts of the mixer in cross section, Fig. 2 is a sectional view taken along line B-B in Fig. 1, and Fig. 3 is a movable wind pressure switch. FIG. 4 is a perspective view of the contact body, FIG. 4 is a circuit diagram, and FIG. 5 is a sectional view of main parts showing another embodiment. 2...Electric motor, 3...Drive shaft, 8...Cutting cutter, 11...Fan, 14...Start switch,
A... Wind pressure switch. Figure 3 Figure 4 Figure 1 Figure 2 Figure 5

Claims (1)

[Scope of Claims] 1. An electric motor that drives a cutting cutter, a fan provided on the drive shaft of the electric motor, a starting switch that energizes the electric motor only at the time of starting, and a starting switch in parallel with the starting switch that drives the electric motor. A cooking appliance characterized by being equipped with a wind pressure switch that closes a motor circuit using wind pressure from a fan provided on a shaft. 2. The cooking appliance according to claim 1, wherein the movable contact body of the wind pressure switch has a small width at the fixed base side and a large area at the tip side to easily receive wind force. 3. The cooking appliance according to claim 1, wherein the functions of a starting switch and a wind pressure switch are performed by a set of movable contact bodies and a fixed contact body. 4. The cooking appliance according to claim 1, characterized in that a fence is provided around the fan provided on the drive shaft of the electric motor, with a part cut out and facing the movable contact body of the wind pressure switch.